oe leeds



June 4, 1929. C, PERRE M 1,715,566

ELECTRIC IGNITION APPARATUS FOR INTERNAL COMBUSTION ENGINES Filed Feb. 10 1927 wwfm 1 it UNITED -Star Patented June 4,1929. r

FREDERICK eni'i x' non PERBEM, on maps, ENGLAitTD, ASSIGNOB o maamiefii TION & niiiio'rRiccoMP NY LIMITED, 013 iniinns, ENGLANDQ'ACOMYPANIVY" oFZGn AT' I BRITAIN- I anaemic eniTioirAP rARATUs non m'rnnivnnrco viisus'rionnivaiivns.

Application filed vreimiaiyio, 1927, Serial N'o.- iem ia'aiia in Great Britain May ii,--192e.:

- This invention relates toelectric ignition.

' apparatus for internal combustion engines, of the klnCl comprising the combination n a a a high tension distributor, low tensiontimer contacts and suitable driving gear, and the object ofthe inventionis a unit device-of compact construction which is readily accessibleiand which permits theworking parts to beexamined'. In particular the trembler,

" high tension distributor andnlow tension timer can be observed in mg conditions.

Ignition vunits of this general are action under workknown, but in no case is it possible to exam- I ADE-the workingparts in operation, it being necessary, for example, to remove somevital part such as the condenser, or to remove the housing which renders the timer and contact breaker inoperative.

" Accordingto my present invention, the electric ignition apparatus for internal combustion engines comprises ,an'electro-magneticallyoperated trembler system associated with an induction ,coil, low tension timer contacts, high tension: distributor,

condenser and driving mechanism, the whole of which is assembled asasingle unit on a single base, the unit beinghoi s'ed in a housing of the known kind capable ofbeing made readily removable in any suitablejand known 1 ,manner for ready accesspto'the 10w, tension timer andhigh tension distributormechanism in working condition; and inthis con-Q struction and arrangement the distributor shaft with its low tension timer and ,high tension distributor are disposed inian accessible positionjon a level above'the induction coil, condenser-and'driving mechanism so as ,to be fully visible and readily accessible when the machine is in operation and the housing or cover is removed. Furthermore, my electric ignition apparatus is'the first of its kind. which embodies an electro-magnetically operated trembler system the whole, of

which is assembled and-contained .in" one v p n the one self contained apparatus, this ensures greater efiiciency' and neatness, and

In the apparatus of the type to which the theignition timing," 1 i V v The construction, arrangement and oper-' While the stationary'part ofthe high tension distributor' is provided with long; enough 'segmentsto cover, the range; of timing varia ti on. In 0011 and battery ignitionv apparatusthcreyis no limit on the Low tension side to the extent of timing variation, but-the length of ,-the segments on the stationary partof the high tension: distributor arbitrarily limits the range. 'A' further feature of the present nvention overcomes this disadvantageja nd permits the apparatus to have any desired degree of timing adjustment. a. According to this further feature of the, invention both the stationary :part of the low tension timer andthe' stationary part of i the high tension distributor'are coupled together and adjusted simultaneously to ,vary

ation of my electric} ignition apparatus is such that the el'ectriccurrentflows fromthe to a circuit or ring connecting the brushes which are on the lowtension tllllel, so that the-current flows to the earthed segmentlor segments of the low" tensiontimeina lead" being continued from the earthed segment or segments to the negative-terminal of the battery and to one end of the secondary,

,windin'g, a lead from the other-end of the -bler spring} Another lead is taken irom' v f-the make-and-break contact on thevibrator secondary windingkbeing connectedto thefh high tension revoluble distributor, and a circuit'is established between the revoluble high tension distributor or a finger on same and thelead or leadsv to the sparking plugs,

so that as the drivingmechanism is revolved 1 sparks. occur 7 atpredetermined periods in the respective sparking plugs. As all the mechanism; is incorporated: as a'single unit reduces cost of manufacture, but thebattery employed may belocated in any other suitable position to suit requirements v An embodiment of the invention designed for a four cylinder four cycle engine is 

